Faradaic impedance 1970-01-01
Faradaic impedance refers to the component of impedance in an electrochemical system that is related to the charge transfer processes occurring at the electrode interface during an electrochemical reaction. It is a crucial aspect of electrochemical impedance spectroscopy (EIS), which is a technique used to study the kinetics and mechanisms of electrochemical reactions. In an electrochemical cell, when a potential is applied, ions in the electrolyte can be oxidized or reduced at the electrode surface.
Faraday paradox (electrochemistry) 1970-01-01
The Faraday paradox, in the context of electrochemistry, refers to a phenomenon observed in electrochemical cells where the behavior of electrons and ions appears counterintuitive. Specifically, it highlights how the current and potential relationship deviates from ideal behavior under certain conditions, particularly in the context of reaction kinetics and mass transport.
Ferroxyl indicator solution 1970-01-01
Ferroxyl indicator solution is a chemical indicator used primarily to test for the presence of iron ions, particularly ferrous iron (Fe²⁺) and ferric iron (Fe³⁺), in a solution. It is particularly useful in analytical chemistry and environmental testing. The Ferroxyl indicator itself typically contains a mixture of a phenolphthalein indicator and a specific reagent that can react with iron ions.
Flow-accelerated corrosion 1970-01-01
Flow-accelerated corrosion (FAC) is a phenomenon that occurs when the protective oxide layer on a metal surface, often in a fluid environment, is disrupted due to the accelerated flow of that fluid. This corrosion process is especially relevant in systems involving liquids, such as in power plants, pipelines, and nuclear facilities, where water or steam is involved.
Galvanic series 1970-01-01
The Galvanic series is a list that ranks metals and alloys based on their electrochemical potential in a specific electrolyte, typically seawater or other electrolytic solutions. It serves as a reference for understanding how different materials will behave when exposed to corrosive environments, particularly with respect to galvanic corrosion.
Galvanic shock 1970-01-01
Galvanic shock, often referred to in the context of dentistry and medical devices, typically describes a sensation or discomfort caused by electrical currents created by certain metal dental restorations (like crowns or fillings) coming into contact with each other or with different materials in the mouth. This phenomenon can occur when a person's dental materials create a slight electric current due to their different electrical potentials when saliva acts as an electrolyte.
Gas cracker 1970-01-01
A gas cracker, also known as an ethylene cracker or steam cracker, is a type of industrial facility used in the petrochemical industry to produce ethylene and other byproducts from feedstocks like natural gas liquids (NGLs), naphtha, or gas oil. The process primarily involves heating these hydrocarbons to very high temperatures in the presence of steam, which breaks down the larger hydrocarbons into smaller molecules.
Gold–aluminium intermetallic 1970-01-01
Gold-aluminium intermetallics are compounds formed between gold (Au) and aluminium (Al) that exhibit distinct properties different from those of either metal alone. These intermetallics typically occur when gold and aluminium are alloyed and can have various stoichiometries and crystalline structures.
Green death 1970-01-01
"Green death" can refer to a few different concepts, depending on the context. Here are some possibilities: 1. **Environmental Context**: In discussions surrounding climate change and environmental degradation, "green death" may refer to the ecological consequences of human actions, such as deforestation, pollution, or habitat destruction, leading to the extinction of species and decline of ecosystems.
Half-cell 1970-01-01
A half-cell is a fundamental component of an electrochemical cell, which consists of an electrode and an electrolyte that facilitates the transfer of ions. In a half-cell, oxidation or reduction (redox) reactions take place, but not both simultaneously. Half-cells are typically used in galvanic cells (which generate electrical energy from spontaneous redox reactions) and electrolytic cells (which use electrical energy to drive non-spontaneous reactions).
High temperature hydrogen attack 1970-01-01
High Temperature Hydrogen Attack (HTHA) is a phenomenon that occurs in certain materials, particularly steels, when they are exposed to high temperatures in the presence of hydrogen. This process can lead to significant degradation of the material's structural integrity. HTHA is particularly relevant in the context of industries like oil and gas, petrochemical, and chemical processing, where equipment is often subject to elevated temperatures and hydrogen-rich environments.
Hydrodimerization 1970-01-01
Hydrodimerization is a chemical reaction in which two molecules of an alkene (or an alkane in some contexts) combine in the presence of hydrogen and a catalyst to form a dimer, a compound containing two identical structural units. This process is often facilitated by catalysts, such as metal complexes, which help to lower the activation energy required for the reaction to occur.
INT (chemical) 1970-01-01
Ideal electrode 1970-01-01
An ideal electrode is a theoretical concept used in electrochemistry and other fields that describes a perfect electrode with specific characteristics. Here are some key features of an ideal electrode: 1. **Inertness**: An ideal electrode does not participate in any chemical reaction itself. It does not undergo any changes in composition or structure during the electrochemical process. 2. **Perfect Conductivity**: It has perfect electrical conductivity, allowing for the unhindered movement of electrons.
Interface (journal) 1970-01-01
"Interface" typically refers to a scientific journal that focuses on interdisciplinary research within the fields of materials science, physics, and engineering, specifically emphasizing interfaces and their properties. The journal publishes research articles, reviews, and short communications that examine the behavior of materials at their boundaries or interfaces, which play critical roles in various physical phenomena and applications. The focus of the journal may include topics such as surface science, nanotechnology, coatings, and interactions between different materials.
Internal oxidation 1970-01-01
Internal oxidation is a process that occurs in certain metals and alloys, particularly those that contain reactive elements such as aluminum or silicon. It involves the oxidation of the metal at or within its grain boundaries or internal structures rather than just on the surface. This can happen when the metal is exposed to an oxidizing environment, usually at elevated temperatures. In internal oxidation, oxygen or other oxidizing agents penetrate into the material, leading to the formation of oxides within the metal rather than a mere surface oxidation layer.
International Society of Electrochemistry 1970-01-01
The International Society of Electrochemistry (ISE) is a professional organization dedicated to the advancement and promotion of electrochemical science and technology. Founded in 1949, the ISE serves as a platform for researchers, educators, and professionals in the field of electrochemistry to share knowledge, collaborate on research, and disseminate new findings. The society organizes events, including annual meetings and symposia, where members can present their research, attend lectures, and network with other professionals.
Ionic partition diagram 1970-01-01
An Ionic partition diagram, also known as an ionic partition coefficient diagram or a partitioning diagram, is a graphical representation used to illustrate how ions distribute themselves between two immiscible phases, often in the context of solvent extraction or chemical analysis. The diagram helps visualize how the different ionic species behave in varying conditions, particularly regarding their solubility and stability in different environments (such as aqueous and organic phases).
Ionic potential 1970-01-01
Isotope electrochemistry 1970-01-01
Isotope electrochemistry is a branch of electrochemistry that focuses on the behavior of isotopes during electrochemical reactions. Isotopes are variants of chemical elements that have the same number of protons but different numbers of neutrons, leading to different atomic masses. This difference in mass can influence the kinetics of electrochemical reactions, as well as the thermodynamic properties of reactants and products.